单选题In order to have ___

单选题 In order to have _____ better understanding of the accident, the three witnesses were called for _____ second meeting．A.a; aB.the; aC.a; 不填D.不填; the

A解析have a better understanding of“对…有很好的了解”；序数词前用不定冠词表示“再一次、又一次”不表顺序。所以

这个问题我还想问问老师呢